Superior Fireplaces WRT3920 Operating instructions

Brand: Superior Fireplaces

Model: WRT3920

Category: Stoves

Type: Operating instructions

EPA Wood-Burning Fireplace

P/N 900881-00 REV. B 10/2018

WRT3920WS

MODELS

WRT3920WS

INSTALLATION AND

OPERATION INSTRUCTIONS

WARNING

• The ﬁreplace cannot be operated without a

door. Consult your dealer to select the correct

replacement door.

• The ﬁreplace is equipped with a blower, electri-

cal connection must be made prior to ﬁreplace

installation

• Important! To assure proper alignment of glass

doors: Install this ﬁreplace in a square and

plumb condition, using shims as necessary at

sides and/or bottom.

• Install the ﬁreplace only as described in these

instructions.

This installation manual will enable you to obtain a safe, efﬁcient

and dependable installation of your ﬁreplace system. Please read

and understand these instructions before beginning your installation.

Do not alter or modify the ﬁreplace or its components under any cir-

cumstances. Any modiﬁcation or alteration of the ﬁreplace system,

including but not limited to the ﬁreplace, chimney components and

accessories, may void the warranty, listings and approvals of this system

and could result in an unsafe and potentially dangerous installation.

IHP wood-burning ﬁreplaces are designed for use as a supplemental

heater. They are not intended for continuous use as a primary heat

source.

Listed to standards:

ULC-S610 and UL-127

Report # 14-181

EPA Cert. No. 111-17

SAVE THESE INSTRUCTIONS

FOR FUTURE REFERENCE

WARNING

•

Hot! Do not touch! The glass and

surfaces of this appliance will be hot

during operation and will retain heat

for a while after shutting off the appli-

ance. Severe burns may result.

•

Carefully supervise children in the

same room as appliance.

•

If small children are present in the home, it is

recommended that this appliance be ﬁtted with

an adjustable safety gate or barrier screen.

An French manual is available upon request. Order P/N 900881-01.

Ce manuel est disponible en francais, simplement en faire la demande. Numéro

de la pièce 900881-01.

CUS

P900881-00

WARNING

This product can expose you to chemicals includ-

ing Carbon Black, which is known to the State of

California to cause cancer, and Carbon Monoxide,

which is known to the State of California to cause

birth defects or other reproductive harm. For more

information go to www.P65Warnings.ca.gov

TABLE OF CONTENTS

Introduction ......................................Page 2

Parts Required .................................Page 2

Optional Equipment ...........................Page 2

Safety Rules ......................................Page 3

Locating the Name Plate ...................Page 3

Operating The Fireplace ....................Page 4

Catalytic Combustor .......................... Page 4

Catalytic Bypass Gauge .....................Page 4

Combustion Control ......................... Page 4

Starting And Maintaining A Fire ........Page 6

Refueling For Best Performance .......Page 6

Smoking – Causes And

Troubleshooting ..............................Page 6

Important Cautions ...........................Page 6

Smoke Detector ...............................Page 7

Carbon Monoxide Monitor ................Page 7

Dealing With A Chimney Fire ............. Page 7

Achieving Clean Burns ......................Page 7

Well Seasoned Fuel ...........................Page 8

Maintaining Your Fireplace ............... Page 8

Catalytic Combustor .......................... Page 8

Refractory Installation .......................Page 11

Disposing of Ashes ...........................Page 11

Door Removal ...................................Page 12

Door Adjustment ............................... Page 12

Glass Care ........................................ Page 12

Fireplace Installation ........................Page 13

Optional Cast Facade Installation ......Page 14

Hearth Extension Requirements ....... Page 14

Cold Climate Installations ..................Page 14

Framing Dimensions .........................Page 15

Nailing Flanges ................................. Page 16

Facing ..............................................Page 16

Fireplace Blower ................................ Page 17

Hot Air Ducting Installation ..............Page 17

Central Forced Air Kit ........................Page 18

Outside Air Kit ................................... Page 19

Draft Requirements ........................... Page 20

Chimney System ...............................Page 20

Offset Chimney Installation ...............Page 22

Angled Wall Radiation Shield ............Page 24

Chimney Support Installation ............ Page 25

Chimney Chase And

Multiple Terminations......................Page 25

Chimney Adaptor ..............................Page 25

Masonry Application Instructions .....Page 26

Installation Accessories ....................Page 27

Replacement Parts ...........................Page 28

Speciﬁcations ....................................Page

Clearance to Combustibles ...............Page 28

Chimney Components Lists ..............Page 29

Safety/Listing Label ...........................Page 31

Warranty ...........................................Page 32

Product Reference Information .........Page 34

THE FIREPLACE

INTRODUCTION

The WRT3920WS wood-burning ﬁreplace is

an energy efﬁcient, heat circulating, closed

combustion ﬁreplace. You will receive a lifetime

of comfort and enjoyment from your ﬁreplace

provided it is installed, maintained and oper

ated properly.

• Please read these instructions and retain

this manual for future reference.

• Before beginning the ﬁreplace installation,

consult the local authorities to obtain your

building permit and check your local building

codes. Install the ﬁreplace only as described

in these instructions and using only IHP

components.

• This ﬁreplace has been tested for CAN/ULC

S610-M87 and ANSI/UL 127 under report

number 3151759. It has also been tested

for EPA 40 C.F.R Part 60, section 60.532(b).

Certiﬁcate number

111-17

• The WRT3920WS ﬁreplace is NOT intended

for use with a gas log set. Do not use a

ﬁreplace insert or any other product with

this ﬁreplace unless it is speciﬁed by IHP

for use with this appliance. Failure to follow

these instructions will void the certiﬁcation

and the warranty of the ﬁreplace and may

result in an unsafe installation.

• These appliances are designed to provide

supplemental heat to the immediate area

only. Therefore, it is advisable to have an

alternate heat source when installed in a

dwelling.

• These appliances are NOT approved for

Manufactured Home installations.

CAUTION: BURN UNTREATED WOOD

ONLY. OTHER MATERIALS SUCH AS

WOOD PRESERVATIVES, METAL FOILS,

COAL, PLASTIC, GARBAGE, SULPHUR OR

OIL MAY DAMAGE THE CATALYST.

CAUTION: DO NOT OPERATE WITHOUT

THE CATALYTIC COMBUSTOR IN PLACE.

CAUTION: NEVER BURN WITH THE BY-

PASS OPENED EXCEPT FOR FIRE START-

UP AND WHEN RELOADING THE STOVE.

CONGRATULATIONS!

When you purchased your new ﬁreplace, you joined the ranks of thousands of individuals

whose answer to their home heating needs reﬂects their concern for aesthetics, efﬁciency

and our environment. We extend our continued support to help you achieve the maximum

beneﬁt and enjoyment available from your new ﬁreplace.

Thank you for selecting a IHP ﬁreplace as the answer to your home supplemental heat-

ing needs.

Available from Security Chimneys

PARTS REQUIRED

Fireplace Model WRT3920WS

• 6” diameter chimney

- Model ASHT+,

S-2100+, HT6000+, HT6103+ or AC manu-

factured by Security Chimneys

only.

• 6” diameter chimney

- Model DuraTech

DTC manufactured by DuraVent

only,

including:

- Chimney lengths

- Elbows (where necessary)

- Associated components as per these

installation instructions

• 7” diameter chimney

- Model ASHT and

HT6103 manufactured by Security Chim-

neys

only.

6” and 7” Chimneys Includes:

- Chimney lengths

- Elbows (where necessary)

- Associated components as per these

installation instructions

• Decorative Door (included in the ﬁreplace)

• Blower (Included w/Fireplace)

• Outside Air Kit (Included w/Fireplace)

OPTIONAL EQUIPMENT

Order Separately - See Pages 27 through 30

• Additional Equipment (optional)

- AC Chimney Starter Section

and

AC Chimney

- Chimney Adaptor 7 inch (6AW7

)

(If you choose to use 7 inch ASHT

HT6103

chimney)

- Forced Air Kit

- Cast Facade Kit

- Blower Speed Control (VRUW)

- Blower Thermodisc Heat Switch

Control (VTU)

uNot tested under EPA certification. If

installed, this appliance no longer quali

ﬁes for EPA certiﬁcation. Check with local

authorities having jurisdiction for require

ments in your area.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Available from DuraVent

WARNING

Be careful adding wood fuel to

the ﬁre or handling ﬁreplace tools

such as shovels, tongs or pokers.

WARNING

The bottom refractory can be

cracked by excessive abuse such

as tossing heavy logs onto the

grate or gouging with ﬁreplace

tools. Exercise caution when

adding wood to your ﬁreplace.

IMPORTANT! GENERAL SAFETY

PRECAUTIONS. READ AND

UNDERSTAND THESE SAFETY

RULES BEFORE YOUR FIRST FIRE.

IMPORTANT

When burning wood, use SOLID

NATURAL DRY WELL-SEASONED

WOOD ONLY. Hardwoods are rec-

ommended (soft woods tend to burn

very quickly).

• DO NOT burn treated wood,

charcoal, coal, trash, card-

board, driftwood, woods dipped

in tar, Christmas tree greens,

pitch, pine tar, creosote, chemi-

cal chimney cleaners, ﬂame

colorants, polystyrene packag-

ing, wood products with syn-

thetic binders (i.e. plywood).

Plywood, lumber and other

misc. materials can produce

abnormally high temperatures,

sputtering and smoking ﬁres

and may contain hazardous

chemicals to treat insects and

fungus.

• Burning unapproved fuels can

produce excessive tempera-

tures, beyond the design capa-

bilities of the ﬁreplace and may

produce excess sparks or may

contain hazardous chemicals.

Burning unapproved fuels can

result in a chimney ﬁre, a house

ﬁre, personal injury, death or

loss of property.

WARNING

NEVER use gasoline, gasoline-

type lantern fuel, kerosene,

charcoal lighter ﬂuid, naphtha,

engine oil or similar liquids to

start or “freshen up” a ﬁre in this

ﬁreplace. Keep any ﬂammable

liquids a safe distance from the

ﬁreplace at all times.

WARNING

Use care when selecting window

treatments for windows located

near the ﬁreplace. Avoid using

combustible flowing window

treatments such as curtains on

nearby windows that are of suf-

ﬁcient length to be blown in front

of an open ﬂame when the window

is opened.

Keep any combustible furniture,

materials or decorative pillows

at least 48" (1219 mm) from the

front ﬁreplace opening.

WARNING

Never leave your ﬁreplace unat-

tended while it is burning.

WARNING

THE FIREPLACE MUST BE OPER-

ATED WITH THE DOORS FULLY

OPENED OR DOORS FULLY CLOSED.

IF THE DOORS ARE LEFT PARTLY

OPENED, GAS AND FLAME MAY BE

DRAWN OUT OF THE FIREPLACE

OPENING, CREATING RISKS OF

BOTH FIRE AND SMOKE.

WARNING

THIS FIREPLACE HAS NOT BEEN

TESTED WITH AN UNVENTED

GAS LOGS OR A FIREPLACE

INSERT. TO REDUCE RISK OF

FIRE OR INJURY, DO NOT INSTALL

AN UNVENTED GAS LOG SET OR

FIREPLACE INSERT OR OTHER

PRODUCTS NOT SPECIFIED FOR

USE WITH THIS FIREPLACE.

WARNING

Never leave children unattended

when there is a ﬁre burning in the

ﬁreplace.

WARNING

To avoid the risk of damaging

ﬁreplace materials and increas-

ing the risk of ﬁre, do not use the

ﬁreplace to cook or warm food.

WARNING

Never modify or alter your ﬁreplace

system in any way. To do so may

create a potential ﬁre hazard and

void the limited warranty

, listings

and approvals of this system.

WARNING

Neither the manufacturer nor the

seller warrants “smoke free”

operation nor are we respon-

sible for inadequate system draft

caused by mechanical systems,

general construction conditions,

inadequate chimney heights,

adverse wind conditions and/or

unusual environmental factors

or conditions beyond our control.

WARNING

Always ensure that the air inlet to

the ﬁreplace is free from debris

and any other obstructions that

can block the entrance of air.

LOCATING THE NAME PLATE

The name plate has been attached to a chain located

inside the front opening below the door. To locate it,

simply place your hand into the center of the opening

and slide it to the right. Locate the chain and pull on

it to access the name plate.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Figure 1

Thermometer

OPERATING THE FIREPLACE

Fuel -

USE SOLID NATURAL WOOD FUEL

ONLY.

This appliance is designed to burn dry

seasoned natural wood only (see Page 8 for a

list of prohibited fuels). Failure to burn proper

fuels only will void the certiﬁcation and the

warranty of the appliance. Hardwoods

are

preferred to softwoods since the energy content

of wood is relative to its density. Hardwoods

will result in a longer burning ﬁre and less

frequent refueling.

A moisture content of 15% to 20% (seasoned)

is recommended. Wood that has been cut and

split and let to dry under a cover for a period

of one year will usually meet that criteria. The

required drying time will vary depending on the

climate. Wood that is packed tight together will

take longer to dry. Seasoned wood is darker in

color than wet wood and will have visible cracks

in the grain on the ends.

Excessively wet wood

will be difﬁcult to burn and will result in lower

efﬁciency, increased creosoting and plugging

of the catalytic combustor.

Excessively dry

wood will burn well but will also have higher

emissions and shorter burning time.

DO NOT OVERFIRE THIS HEATER

Attempts to achieve heat output rates that

exceed heater design speciﬁcations can result

in permanent damage to the heater.

First Fires

The ﬁrst ﬁve or six ﬁres should be small ﬁres

of short duration (about 30 to 60 minutes).

This will help cure the refractory bricks.

During

the ﬁrst few ﬁres of this appliance there may

be some odor and smoke due to the curing of

the paint, dust accumulation and burning off of

lubricants used in the manufacturing process

It may set off a smoke alarm located in the same

room. For this reason the room should be well

ventilated for the ﬁrst few ﬁres.

Catalytic Combustor

This ﬁreplace is equipped with a catalytic com-

bustor. Unburned by-products of the wood ﬁre

are burned as they pass through the combustor

resulting in less pollution, reduced creosote and

higher efﬁciency. In order to have the catalyst

working, temperatures of the ﬂue gases entering

the combustor have to be higher than 500° F

(260° C). That is why the unit is equipped with

a CAT bypass damper that allows the draft air

to bypass the catalytic combustor. Opening the

CAT bypass damper control increases the draft

allowing the unit to achieve proper operating

temperatures during a cold start-up. It also

provides more draft to prevent smoke spillage

when the door is opened.

Catalytic CAT Bypass Gauge

To determine when to close the CAT bypass,

the unit is equipped with a gauge (see Figure

1). Once you can see the gauge needle in the

catalytic combustor operating range, you may

push to close the CAT bypass lever, about 15-30

minutes after initial light-off.

When the catalyst light-off conditions are

achieved, the combustor will keep on going

until it runs out of smoke. Note that the catalyst

does not need to be glowing to be working, it

can work very well at temperatures well below

the 538° C (1000° F) level at which it will begin

to glow. The best way to see if the catalyst is

active is to take a look at what is coming out

of the chimney. If the catalytic combustor is

working you will see some white water vapor

coming out, compared to a more brown/gray

smoke when the CAT bypass is opened. Do

not burn any chemical chimney cleaner; it can

make the catalyst inactive.

COMBUSTION CONTROLS

Primary Air Control

There is no ﬂue damper in the ﬁreplace. As is

common with air tight stoves, the combustion

air control sets the ﬂow of air entering the ﬁre-

box. This allows for a more precise control of

the ﬁre. The combustion air control is located

below the door on the left side. The main source

of air (primary air) entering the ﬁrebox can

be diminished by moving the air combustion

control from left to right. The primary air is

fully opened when the air control is completely

moved to the left.

This manual describes the installation and operation of the IHP model WRT3920WS catalytic equipped

wood heater. This heater meets the 2020 U.S. Environmental Protection Agency’s certiﬁed to comply

with 2020 particulate emission standards using crib wood. Under speciﬁc test conditions this heater

has been shown to deliver heat at rates ranging from 10,900 to 35,600 Btu/hr.

This wood heater has a manufacturer-set minimum low

burn rate that must not be altered. It is against federal

regulations to alter this setting or otherwise operate

this wood heater in a manner inconsistent with the

operating instructions in this manual.

Detail A

See Detail A

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

The combustion air control should be in the

closed position when the ﬁreplace is not in use.

This will minimize air leakage up the chimney.

The combustion air control and the CAT bypass

damper control must be opened before opening

the door to minimize the possibility of back

draft coming into the room.

Accelerated Combustion

The maximum heat output for the WRT3920WS

ﬁreplace is achieved by burning with the door

closed and the combustion air opened. By this

method, the WRT3920WS ﬁreplace can produce

the maximum BTU of heat per hour. However,

it will be necessary to reload with wood every

one or two hours. This is the least efﬁcient

method of burning the WRT3920WS ﬁreplace.

Use caution when ﬁring with the combustion

air control wide open. Only burn cord wood

in this manner. Small dry pieces of softwood

and construction scraps will burn very intensely

using this method and may damage the ﬁrebox.

Medium Combustion

This is the recommended mode of operating

the WRT3920WS ﬁreplace and should be the

one normally used since it will deposit the least

amount of creosote on the glass and in the

chimney. The combustion air control must be

3/4 closed. The precise setting will depend on

many factors, including chimney length and the

moisture content of the wood.

For instance, a long chimney will necessitate

closing the damper more. To obtain the proper

combustion, close the damper completely, then

open it about 1/4” to 1/2” (6.4mm to 13mm).

Two medium size pieces of wood should be

burning on a bed of hot coals. The heat output

will be approximately 25,000 BTU per hour and

the loading time will be about every 3-4 hours.

Softwoods may be burned using this method

but the burn time will be substantially reduced.

Slow Combustion

When the air combustion control is completely

closed, the ﬁreplace is in a slow combustion phase.

If the hearth is hot enough, slow combustion will

not extinguish the ﬁre, but there will be a notice-

able change in the ﬂame pattern. The ﬂames will

be slow and may appear dirty if the wood is too

wet (moisture content of 20% and more). Do not

allow the wood to burn without ﬂame, since this

will produce excessive creosote in the unit.

Creosote may accumulate on the glass door.

This method of burning should be used only

after operating the WRT3920WS ﬁreplace with

the air control opened to produce a hot ﬁre for

about an hour or at medium pace for at least

three (3) hours. Slow combustion can be used

at night in order to reduce the heat output and

to prolong the burn. The loading time will be

between 6-8 hours.

Figure 2 - Accelerated Combustion

Figure 3 - Medium Combustion

Figure 4 - Slow Combustion

Figure 5 - CAT Bypass

Open

Closed

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

D. Wet wood

Wet or tarred wood will smoulder and smoke

instead of burning properly. Your dealer can

help you determine if you have properly

seasoned wood for burning.

E. Dirty or blocked chimney

Check to make sure the chimney is clear and

clean. If dirty call a certiﬁed chimney sweep

or use a properly sized chimney brush to

clean.

F. Chimney not long enough

The minimum chimney height is twelve

(12) feet (3.7 m) not including the ﬁreplace

height. The chimney must extend at least

three (3) feet (915 mm) above its point

of contact with the roof and at least two

(2) feet (610 mm) higher than any roof or

wall within ten (10) feet (3 m) of it. When

installed with offsets, the minimum chimney

height is ﬁfteen (15) feet (4.6 m). Additional

height will increase draft and will decrease

the tendency to smoke.

G. Poor chimney draft

With no ﬁre, there should be sufﬁcient draft to

exhaust cigarette smoke introduced under the

bafﬂe. Chimneys installed against an outside

wall without protection or a basement installa

tion may generate back draft problems which

will cause start-up problems. To prevent this,

open a nearby window, roll up a piece of paper

and light it. Then, hold it in the upper part of

the ﬁrebox to warm up the chimney. Wait until

the draft is sufﬁcient, then start the ﬁre.

H. Blower for forced air kit operating - Make

sure that the blower is at the “off” position

when you open the ﬁreplace door for reloading.

IMPORTANT CAUTIONS

A. Do not block any hot air vents from the

ﬁreplace as this will cause the ﬁreplace

to overheat.

B. Never use gasoline, gasoline-type lantern

fuel, kerosene, charcoal lighter ﬂuid, or

similar liquids to start or ‘freshen up’ a ﬁre

in this ﬁreplace. Keep all such liquids well

away from the ﬁreplace while it is in use.

C. Do not burn coal. The sulphur in coal will

corrode the ﬁrebox.

D. Do not burn driftwood which has been in the

ocean or salt water. The salt will corrode

the ﬁrebox and chimney.

E. Do not operate the unit with the door partly

open since this may cause smoke to be

drawn into the room.

F. Do not burn wood in the area in front of the

andirons.

G. Do not abuse the unit by burning paper, or

cardboard or construction material such as

pressed wood, plywood or lumber. Wood

protectors, metallic paper, coal, plastic,

waste, sulphur and/or oil will damage the

ﬁreplace.

H. Do not allow the wood to smoulder or burn

without ﬂame, since this will produce

excessive creosote in the unit

as well as

increased particulate emissions.

STARTING AND MAINTAINING A FIRE

Step 1. Place several crumpled up balls of

newspaper in the ﬁrebox. Place small dry pieces

of kindling on top of the paper, criss-crossing

the kindling so that there are air spaces in

between. The kindling should be placed at the

center of the ﬁrebox so as to allow for sufﬁcient

air circulation.

Step 2. Adjust the primary air control into the

OPEN position. Light the newspaper. Leave the

door partially opened to facilitate the start-up.

Step 3. Once kindling ﬁre is well established,

cord wood can be added. You may set the

primary air control to the desired level (see

Primary Air Combustion Control section for

proper operation of the air controls). Close the

door and maintain an accelerated combustion

air set up in order to achieve combustor light-

off conditions.

Step 4. When the ﬁre is burning well, and you

can see the gauge needle in the catalytic com-

bustor operating range, close the CAT bypass

damper control by pushing the control rod in. It

takes about 15–30 minutes with the CAT bypass

opened to reach proper light-off temperatures

for the catalytic combustor.

Step 5. Set the primary control to the desired

burn level. The ﬁreplace will automatically go

to that level after the ﬁre is fully established.

The unit will burn best with 2-3 pieces of cord

wood spaced 1 to 2 inches apart and allowing

air to get under the fuel. Criss-crossing or ar-

ranging the fuel so that air can get underneath

will help the ﬁre to get started easily. The unit

should be operated with the air control fully open

long enough to get the cord wood well ignited.

REFUELING FOR BEST PERFORMANCE

To refuel the ﬁreplace at the end of a burn cycle

when only hot embers remain and ﬂames are

gone (not enough heat to maintain catalyst

operating temperatures):

Step 1. Open the CAT Bypass fully (see Figure 5).

Step 2. Completely open the air control level.

See Figure 2.

Step 3. Open the door about 1” and wait 5

seconds until the air ﬂow has stabilized. Then

open the door completely, put the logs in and

close the door.

Step 4. Set the air control to the desired burn

level. Open the CAT bypass damper for 10 min-

utes before closing it. It will ensure sufﬁcient

temperatures for combustor light-off.

To refuel the

WRT3920WS ﬁreplace when the

unit is still hot (some burning fuel remaining

or a glowing combustor)

A. Open the air control and the CAT bypass

completely.

B. Open the door about 1” and wait 5 seconds

until the air ﬂow has stabilized. Load the fuel,

close the door and CAT bypass (temperatures

within the ﬁrebox should be enough to

maintain catalytic operation).

C. Set the air control to the desired burn level.

NOTES:

• For spectacular ﬁre and optimization of the

ﬁreplace efﬁciency, we recommend that the

wood load be placed as far back as possible.

• It may be necessary to turn off any blower(s)

in operation during the refueling process in

order to minimise smoking in the room. It

is recommended to wait 15 to 30 minutes

before turning the blower back on to ensure

successful rekindling.

SMOKING –

CAUSES AND TROUBLESHOOTING

To reduce the likelihood of smoke coming

into the room when opening the door, set the

combustion air controls to the left (“Acceler-

ated Combustion”) and open the CAT bypass

before opening the door. Your ﬁreplace has

been designed and tested to provide smoke

free operation.

As the ﬁre burns, air goes up the chimney.

This air must be replaced through the outside

air duct. When operating the ﬁreplace, open a

nearby window temporarily to check if there is

adequate replacement air supply. Occasionally,

there may be a small amount of smoking upon

lighting the ﬁre, until the chimney heats up but

this should not last. If the ﬁreplace continues

to smoke it is probably for one of the follow-

ing reasons:

A. The door is partially opened - When you

open the door, open them completely.

B. Negative pressure in the house

As the ﬁre burns, air goes up the chimney.

This air must be replaced through leakage

into the house or through the outside air duct

(included with ﬁreplace). When operating the

ﬁreplace, open a nearby window temporarily

to check if there is adequate replacement air

supply.

C. Fans operating (e.g.: range hood)

These fans draw air out of the house and

may actually cause a negative pressure in the

house. Turn off all fans and open a nearby

window to determine if this is the cause of

the problem.

REFUELING: During the refueling and

rekindling of a cool ﬁre, or a ﬁre that has

burned down to the charcoal phase, operate

the stove at a medium to high ﬁring rate for

about 10 minutes to ensure that the catalyst

reaches approximately 500°F.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

SMOKE DETECTORS RECOMMENDED

Since there are always several potential sources

of ﬁre in any home, we recommend installing

smoke detectors. If possible, install the smoke

detector in a hallway adjacent to the room

(to reduce the possibility of occasional false

activation from the heat produced by these

appliances). If your local code requires a smoke

detector be installed within the same room, you

must follow the requirements of your local code.

Check with your local building department for

requirements in your area.

CARBON MONOXIDE MONITOR RECOM-

MENDED

Carbon Monoxide Poisoning: Early signs of

carbon monoxide poisoning are similar to the

ﬂu with headaches, dizziness and/or nausea.

If you have these symptoms, obtain fresh air

immediately. Some people are more affected

by carbon monoxide than others, including

pregnant women, people with heart or lung

disease or anemia, those under the inﬂuence

of alcohol, and those at high altitudes.

It is against federal regulations to operate

wood heaters in a manner inconsistent with

the operating instructions in the manual.

Dealing With a Chimney Fire

Regular chimney maintenance and inspection

can prevent chimney ﬁres. If you have a chimney

ﬁre, follow these steps:

1. Close the ﬁreplace door and the combustion

air controls.

2. Alert your family of the possible danger.

3. If you require assistance, alert your ﬁre

department.

4. If possible, use a dry chemical ﬁre extin-

guisher, baking soda or sand to control the

ﬁre. Do not use water as it may cause a

dangerous steam explosion.

5. Check outside to ensure that sparks and hot

embers coming out of the chimney are not

igniting the roof.

6. Do not use the ﬁreplace again until your

chimney and ﬁreplace have been inspected

by a qualiﬁed chimney sweep or a Fire

Department Inspector.

ACHIEVING CLEAN BURNS

Check the exhaust after engaging the catalyst

(see Figure 6). Large amounts of smoke indicate

an improper burn setting (either too high, or too

low of a temperature to operate the catalyst).

Adjust and recheck in 5 to 10 minutes.

Figure 6

WHAT DOES “WELL-SEASONED” MEAN?

When a tree is cut down, the wood is green,

full of sap and moisture. This moisture content

can exceed 80%, which must be reduced to

less than 20%. Wood properly seasoned is

then capable of generating the heat the stove

was designed to provide.

Green wood does not burn easily. Attempting to

burn green wood often results in a lot of smoke

and very little ﬁre. Time is the most important

factor in seasoning wood. Ideally the moisture

content should be reduced to 11-20%. NOTE:

The use of a ﬁrewood moisture meter is rec

ommended to ensure the ﬁrewood contains

less than 20% moisture.

Seasoning Guide

Softwoods - 6 months to 18 months

Hardwoods - 12 months to 24 months

Logs that are 5” diameter across or larger should

be split in half, three pieces if over 8 inches, and

four pieces when over a foot across. If a tree

has been dead for 2 - 4 years it still needs to

be cut, split, and seasoned for 6 to 24 months

depending on the wood.

Standard

Cord of

Wood

8 Ft.

(2.4M)

4 Ft.

(1.2M)

4 Ft. (1.2M)

Figure 8

Prohibited Fuels

This heater is designed to burn natural wood

only. Higher efﬁciencies and lower emissions

generally result when burning air dried seasoned

hardwoods, as compared to softwoods or to

green or freshly cut hardwoods. DO NOT BURN:

• Garbage;

• Lawn clippings or yard waste;

• Materials containing rubber, including tires;

• Materials containing plastic;

• Waste petroleum products, paints or paint

thinners, or asphalt products;

• Materials containing asbestos;

• Construction or demolition debris;

• Railroad ties or pressure-treated wood;

• Manure or animal remains;

• Salt water driftwood or other previously salt

water saturated materials;

• Unseasoned wood;

• Christmas tree branches;

• Paper products, colored paper, cardboard,

plywood, or particleboard;

• gasoline;

• naphtha;

• engine oil;

• ﬂammable liquids;

• solvents;

• grease; or

• coal

The prohibition against burning these materials

does not prohibit the use of ﬁre starters made

from paper, cardboard, saw dust, wax and

similar substances for the purpose of starting

a ﬁre in an affected wood heater.

Burning these materials may result in release

of toxic fumes or render the heater ineffective

and cause smoke.

Intense ﬁring with these

materials may overheat the ﬁreplace, causing

damage to the unit, a ﬁre or even possibly ignit

ing a chimney ﬁre if the chimney is creosoted.

Burning unapproved fuel, resulting in excessive

pollutants being emitted, may be prohibited and

subject to a ﬁne or other penalty by the authority

having jurisdiction in your area.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

MAINTAINING YOUR FIREPLACE

Have your product inspected at least once

a year by a qualiﬁed service technician to

ensure gaskets, air tubes, bafﬂes, and vent-

ing are in good repair to ensure proper per-

formance. Have degraded items replaced

by a qualiﬁed service technician.

This wood heater needs periodic inspection

and repair for proper operation. Consult the

owner’s manual for further information. It is

against federal regulations to operate this

wood heater in a manner inconsistent with

the operating in this manual.

Creosote - Formation and Need for Removal

When wood is burned slowly, it produces tar

and other organic vapors, which combine

with expelled moisture to form creosote. The

creosote vapors condense in the relatively

cool chimney ﬂue of a slow-burning ﬁre. As

a result, creosote residue accumulates on the

ﬂue lining. When ignited this creosote makes

an extremely hot ﬁre.

The chimney shall be inspected at least twice

a year during the heating season to determine

when a creosote buildup has occurred.

When creosote has accumulated it shall be

removed to reduce the risk of a chimney ﬁre.

When the creosote accumulation is large, a

creosote ﬁre in the chimney can damage the

chimney and overheat the surrounding wood

framing. Creosote formation in a chimney can

be minimized by making sure there is always

visible ﬂame burning, avoid smouldering ﬁres

and by proper refuelling techniques.

Chimney Maintenance

Regular chimney inspection and maintenance

combined with proper operation will prevent

chimney ﬁres. Keep your chimney clean. Do

not allow more than 1/16” (1.6 mm) creosote

build up in your chimney.

The amount of creosote will depend on variables

such as frequency of use and type of ﬁre. We

recommend that you:

A. Initially inspect the chimney system weekly.

From this, you will learn how often it will be

necessary to clean your chimney.

B. Have your chimney cleaned by a qualiﬁed

chimney sweep. If you wish to clean it

yourself, we recommend using a stiff plastic

or non-metallic brush. If a metal brush is

used, its size should be slightly smaller than

the ﬂue to avoid damaging the chimney. Do

not use a brush that will scratch the stainless

steel interior of the chimney.

C. Do not expect chemical cleaners to keep

your chimney clean. The rain cap can be

removed for inspection and/or cleaning of

the chimney.

Before performing chimney sweep, open

the CAT bypass and remove the combustor.

Remove dust accumulation after chimney

sweep and put the combustor back in place.

CATALYTIC COMBUSTOR

This ﬁreplace is designed with a catalytic com-

bustor which will reduce pollution emissions

and creosote build up while improving thermal

efﬁciency. In order to optimize and maintain

the combustor performance, it is important to

visually check the combustor at least 3 times

during the heating season to determine if physi-

cal degradation has occurred.

Catalytic combustors require little maintenance.

Cleaning the combustor once a year, preferably

when your ﬂue system is serviced, is sufﬁcient

for most users.

WARNING

To prevent damage to your com-

bustor, do not:

• Drop the combustor (which is

fragile compared to the rest of

the unit – so handle with care)

• Run water or compressed air

through the combustor

• Try to clean the combustor with

any sharp tool

The combustor supplied with this heater is

an Innovative Hearth Products Combustor.

Consult the catalytic combustor warranty

also supplied with this wood heater. War

ranty claims should be addressed to:

Innovative Hearth Products

1769 East Lawrence Street,

Russelville, AL 35654

Phone: 800-655-2008

The packaging of the combustor must be

robust enough to protect against any ship

ping damage that may occur.

Catalyst Monitoring

It is important to periodically monitor the

operation of the catalytic combustor to ensure

that it is functioning properly and to determine

when it needs to be replaced. A non-functioning

combustor will result in a loss of heating ef-

ﬁciency, and an increase in creosote and emis-

sions. Following is a list of items that should

be checked on a periodic basis:

• Combustors should be visually inspected at

least three times during the heating season

to determine if physical degradation has

occurred. Actual removal of the combustor

is not recommended unless more detailed

inspection is warranted because of decreased

performance.

If any of these conditions exists, refer to Cata-

lyst Troubleshooting section of this owner’s

manual.

• This catalytic heater is equipped with a tem-

perature probe to monitor catalyst operation.

Properly functioning combustors typically

maintain temperatures in excess of 500°F,

and often reach temperatures in excess of

1,000°F. If catalyst temperatures are not in

excess of 500°F, refer to Catalyst Trouble-

shooting section of this owner’s manual.

• You can get an indication of whether the cata-

lyst is working by comparing the amount of

smoke leaving the chimney when the smoke

is going through the combustor and catalyst

light-off has been achieved, to the amount of

smoke leaving the chimney when the smoke

is not routed through the combustor (CAT

bypass mode).

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Cleaning Procedure (see Figure 9A):

Tools required: (2) 9/16” wrenches, #2 square

drive bit/driver

With catalyst bypass in closed position, remove

(2) bafﬂe boards from ﬁrebox.

1. Using (2) 9/16” wrenches, loosen and

remove the bolt and nut that connects the

linkage arm to the catalyst bypass box

2. Loosen (3) square drive screws mounting

bypass assembly hinge bracket to back of

ﬁrebox.

3. In an upward and forward pulling motion,

remove assembly from mount and drop

between the front and middle burn tube.

4. Installation is reverse of disassembly.

NOTE: Ensure bypass assembly is sealed to

ceiling of ﬁrebox upon reinstallation. Adjust

ment can be made by loosening (3) mounting

screws and sliding the hinge bracket up or down

to create better seal and then retightening.

Catalyst Bypass linkage replacement

(see Figure 9B):

Tools required: (2) 9/16” wrenches, #2 square

drive bit/driver

With catalyst bypass in closed position, remove

(2) bafﬂe boards from ﬁrebox. Place catalyst

bypass in open position.

1. Using (2) 9/16” wrenches, loosen and remove

the bolt and nut that connects the linkage

arm to the catalyst bypass box

2. On ceiling of ﬁrebox, adjacent to linkage arm,

locate and remove (2) square drive screws.

3. Outside of unit, just left of bypass engage-

ment lever, remove (1) square drive screw.

Linkage assembly is now free to remove from

above the ﬁrebox. Lift linkage assembly up,

while turning clockwise until linkage arm is

removed from slot in ﬁrebox. Assembly can

now be removed while on its side.

Installation is reverse of disassembly.

Figure 9B - Catalyst Bypass Linkage Replacement

Figure 9A - Cleaning Procedure

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

CATALYTIC COMBUSTOR TROUBLESHOOTING GUIDE

Problem Condition Solution

Ash Build-up on Combustor Surface Normal Ash, a ﬂuffy light gray powder, and soot, accumulate on the com-

bustor surfaces in normal use. Ashes accumulate as a result of the

smoke being burned within the combustor and carried out of the

ﬁrebox by the chimney draft. Soot is the result of previous creosote

deposits having been burned off or foreign materials being burned

in the ﬁrebox. This is normal and will be eliminated during the next

burn.

Combustor Clogging Creosote Combustor should be cleaned (see Page 11). Do not use air pres-

sure or sharp objects to clean combustor.

Broken Combustor Crack or Break The combustor is manufactured from a ceramic material and there-

fore can crack or break. However, the combustor will still function if

cracked. If combustor is broken into pieces and dis-lodged from the

housing, it will need to be replaced.

Combustor Malfunction Not Working The combustor should last a minimum of 10,000 hours of opera-

tion. The combustor will lose catalytic capability over time. When

you see continuous smoke coming from the chimney, the combus-

tor should be cleaned. If the smoking persists, the combustor

should be replaced.

Combustor Problem Thermal Erosion This combustor does NOT experience thermal erosion. “Not ap-

plicable.” Applies to honeycomb combustors only.

Combustor Problem Thermal Cracking This combustor does NOT experience thermal cracking. “Not ap-

plicable.” Applies to honeycomb combustors only.

Combustor Problem Combustor Peeling This combustor does NOT experience combustor peeling. “Not

applicable.” Applies to honeycomb combustors only.

Reduced Combustor Performance Combustor Clogging or Fatigue Signs of combustor fatigue include reduced heat output and slug-

gish performance. Inspect and clean combustor. Replacement

may be required. Monitor performance and smoke coming from

chimney.

Combustor not glowing Late stage of burn Combustor does not need to be glowing to be working. Check

smoke exiting chimney to help determine if combustor is working

properly.

Appliance burning too hot or fast Doors are not properly closed. Close doors securely. Check door gasket.

Excessive draft Adjust primary air control to lower setting.

Back-pufﬁng or sudden internal ignitions Operating technique Open bypass and primary air control before opening to reload and

keep it open a few minutes after reloading.

Burn rate too low Open air damper to allow for hotter burn.

Chimney down draft In high wind areas, a specially designed wind cap may be neces-

sary.

Combustor or louvered housing plugged Clean combustor / louvered housing of accumulated ﬂy ash.

Appliance Smokes Operating technique Open bypass and air damper prior to reloading appliance.

Blocked Chimney Examine chimney and vent pipe for blockage and creosote accumu-

lations. Check spark arrestor screen on your cap, if you have one.

Blocked outside air duct Check the outside air inlet for blockage caused by snow, debris, or

insects.

The intense heat of the ﬁre will normally cause

hairline cracks in the refractory. These cracks

can be minimized by proper curing as described

in “First Fires”. They will not normally dimin-

ish the effectiveness of the refractory. If large

cracks develop, then the refractory should be

replaced. To replace the refractory bricks, follow

these steps (see Figure 10):

1. Remove the bottom refractory

2. Remove the front refractories

3. Remove the left side refractory

4. Remove the right side refractory

5. Remove the back refractory

6. Remove the front ceramic bafﬂe

7. Remove the rear ceramic bafﬂe

To install the new refractories, follow the above

steps in reverse.

DISPOSING OF ASHES

Whenever ashes get 3 to 4 inches deep in your

ﬁrebox, and when the ﬁre has burned down and

cooled, remove excess ashes. Leave an ash bed

approximately 1 inch deep on the ﬁrebox bottom

to help maintain a hot charcoal bed.

Remove ashes only when the ﬁre is out and

the ashes are cold (24 to 48 hours after the

ﬁre is out).

Do not leave the ashes in the house as they give

off carbon monoxide and other toxic gases.

WARNING

Disposal of Ashes: Ashes should

be placed in a steel container

with a tight ﬁtting lid and moved

outdoors immediately. The

closed container of ashes should

be placed on a non-combustible

ﬂoor or on the ground well away

from all combustible materials,

pending ﬁnal disposal. If the

ashes are disposed of by burial

in soil or otherwise locally dis-

persed, they should be retained

in the closed container until all

cinders have thoroughly cooled.

REFRACTORY REPLACEMENT

Healthy Combustor - Unused

Combustor Problem - Ash, a ﬂuffy light grey powder,

and soot, accumulate on the combustor surfaces in

normal use. In extreme situations combustor can

become clogged and should be cleaned.

Combustor Problem - Broken Combustor

Combustor Problem - Cracked Combustor

Figure 10

1. Bottom Refractory

2. Front Refractories

3. Left Side Refractory

4. Right Side Refractory

5. Back Refractory

6. Left Ceramic Bafﬂe

7. Right Ceramic Bafﬂe

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Figure 11 - Door Installation

DOOR REMOVAL

To remove the door, simply pull the door up from the hinges (see Figure

11). The door adjustment has been set at the factory. If the ﬁt is still not

perfect, you can adjust the door using the hinge screws.

DOOR ADJUSTMENT

The door may need to be adjusted to be completely airtight. The gaskets’

air-tightness can be adjusted using two adjustment screws located on the

right side of the ﬁreplace facade (An Allen key #1/8 – not supplied - will

be necessary for this adjustment).

WARNING

•

Use only a IHP glass doors, speciﬁcally designed

for the WRT3920WS ﬁreplace.

•

The ﬁreplace cannot be operated without door.

Consult your dealer to select the correct replace-

ment door.

•

Important! To assure proper alignment of glass

doors: Install this ﬁreplace in a square and

plumb condition, using shims as necessary at

sides and/or bottom.

Checking Door Seal

A one-inch strip of paper may be used to perform a test of the integrity

of the door seal. Close the door on the paper in at least eight points. It

is normal to feel only a slight amount of friction. The door gasket does

not need to be “tight” in all areas, since a small amount of leakage is not

hazardous or detrimental to the performance of your ﬁreplace.

GLASS CARE

Glass Replacement

The glass used for the WRT3920WS ﬁreplace is a high temperature ceramic

glass (1,400° F / 760° C). If the glass breaks, it must be replaced with

an identical ceramic glass. Tempered glass or ordinary glass will not

withstand the high temperatures of the WRT3920WS ﬁreplace. Replace-

ment glass should be purchased from a IHP dealer (see “Replacement

Parts”, Page 28).

DO NOT OPERATE THE UNIT WITH CRACKED OR BROKEN GLASS.

Glass Cleaning

The WRT3920WS ﬁreplace is designed to keep the glass clean under normal

operating conditions. If the WRT3920WS ﬁreplace is operated continu-

ously with the combustion air controls closed, the glass will tend to get

dirty unless the fuel, ﬁrebox and glass are maintained at hot temperatures

(see “Refueling For Best Performance”). To clean the glass, there are a

number of specially designed cleaners. Your IHP dealer can recommend

a suitable cleaner which is available in your area. Regular household

glass cleaners will not clean creosote. Do not use abrasives such as

steel pads, steel wool or oven cleaner as they will scratch the glass.

DO NOT USE CHEMICAL GLASS CLEANERS ON PAINTED SURFACES

AS IT MAY CAUSE THE PAINT TO PEEL.

CAUTION : DO NOT ALLOW WINDOW CLEANER TO GET IN CONTACT

WITH DOOR GASKET OR PAINT ON FACADE OR DOOR. ONCE CLOSED,

CONTACT OF GLASS CLEANER WITH THE FIREPLACE FACADE CAN

PROVOKE PAINT PEELING OFF.

Gasket Replacement

Remove the door from the unit (see Page 12) and lay it on a clean un-

abrasive surface. To replace the gasket, ﬁrst remove all of the old gasket

and gasket cement. Make sure that the surface is totally clean before

applying new cement (a high temperature silicone caulking rated at 500°

F [260° C], is suitable) or adhesion problems may result. Apply gasket

cement to the gasket channel and install the new gasket. This replace-

ment part is available from your IHP dealer in the following dimensions:

Gasket Length* Dimensions Part No.

Around Glass

(1753)

1 x 3/16

(25 x 4.8)

PR-SR1685H

On Door Frame

(1854)

3/4 dia

(19.5)

PR-SR1823O

Table 1

*NOTE: Inches (millimeters)

Figure 12

Gasket

Adjustment

Screw

Hinges

Adjustment

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

This ﬁreplace may be installed directly on the ﬂoor or on a raised base

(for proper guidelines, refer to “Hearth Extension Requirements”) and a

minimum of 6’8” (2 m) measured from the base of the appliance to the

ceiling is required.

When selecting the location, the chimney outlet position and the direction

of the wind are important factor affecting the chimney performance. To

allow a maximum draft and to reduce wind turbulence, the chimney must:

• Penetrate the highest part of the roof.

• Be installed as far as possible of roof offsets, trees or any other

obstructions that may cause wind turbulence and back drafts in the

chimney.

• The least amount of offsets (elbows) possible. NOTE: A maximum of

2 offsets is allowed.

FIREPLACE INSTALLATION

Locating The Fireplace

The best location to install your ﬁreplace is determined by considering

the location of windows, doors, and the trafﬁc ﬂow in the room where the

ﬁreplace is located, allowing space in front of the unit for the hearth exten-

sion and the mantel, and taking into consideration the location of the hot

air ducts (optional), outside air kit (included with ﬁreplace) and chimney.

If possible, you should choose a location where the chimney will pass

through the house without cutting ﬂoor or roof joists (see ﬁreplace

dimensions Page 15).

Usually, no additional ﬂoor support is needed for the ﬁreplace. The

adequacy of the ﬂoor can be checked by ﬁrst estimating the weight of

the ﬁreplace system. Weights are given on Page 28. Note the ﬂoor

construction and consult your local building code to determine if ad-

ditional support is needed.

Marginal Location

Wind Direction

Location

Not

Recommended

Outside Air Intake

Facing the Wind

Location

Not

Recommended

Location Recommended

Figure 13

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Figure 15

Optional Cast Facade installation

Install the Facade per instructions provided in

Facade Kit (ordered separately - see Page 27).

Framing, Facing And Mantel

The construction of the framing, facing, and

mantel must be in accordance with the stan

dards and the following illustrations (Figures

16 and 17):

A. Frame the ﬁreplace using 2” x 3” or heavier

lumber.

B. WARNING: Combustible materials can-

not be used in the space directly above

the ﬁreplace, except for the studs above

the facade that support the facing and

mantel. This area must remain empty

for a height of 6’8” (2,032 mm) mea

sured from the base of the appliance.

C. Frame the ﬁreplace with vertical studs at the

sides of the ﬁreplace running from ﬂoor to

ceiling (see Figure 16). If combustible facing

is to be used, position the studs back, from

the front edge of the ﬁreplace (a space that

is the thickness of the facing material, so

that the facing can be installed ﬂush with the

ﬁreplace facing). Frame headers between

the vertical studs only as follows:

• Place 2” x 3” or 2” x 4” headers,

only along the upper part of the front,

side and back faces (some codes

may require a 2” x 6” on an outside

bearing wall). Do not put wood or

any combustible material within the

area above the ﬁreplace except on the

front facing.

• Place headers only as required to sup

port the facing and mantel.

D. WARNING: The ﬁreplace must not be in

contact with any insulation or loose ﬁll

ing material. Cover the insulation with

drywall panels around the ﬁreplace.

HEARTH EXTENSION REQUIREMENTS

The WRT3920WS ﬁreplace may be installed

directly on a combustible ﬂoor. The supplied

safety metal strip must be positioned as follows:

One half under the front of the ﬁreplace and the

other half must extend on the ﬂoor over which

the hearth extension will be built (see Figure 14).

* The safety metal strip must cover the entire

width of the ﬁreplace

The combustible ﬂoor in front of the ﬁreplace

must be covered with at least a 1/2 inch of

non-combustible material (tile, marble, stone,

etc). See Figure 15.

COLD CLIMATE INSTALLATIONS

Climates where temperatures will fall below

32° F (0° C).

The heating performance of the appliance will

vary depending upon the level of insulation,

house design, how the appliance is operated, etc.

If this ﬁreplace is being installed in a cold

climate, it is especially important to seal all

cracks around the ﬁreplace and wherever cold

air could enter the room with noncombustible

material.

Also, the outside air inlet duct should be wrapped with noncombustible insulation to minimize

the formation of condensation.

Do not place insulation materials directly against the chimney sections. We recommend that

you use the insulated wall radiation shield since it will maintain the home’s thermal barrier. AC

chimney is NOT recommended in very cold climates (in areas with temperatures below 32°F (-0°C).

WARNING: THE HEARTH EXTEN-

SION IS TO BE INSTALLED ONLY

AS ILLUSTRATED.

Hearth extension of an elevated ﬁreplace

must respect the same minimal dimensions

as a ﬁreplace installed directly on the ﬂoor.

Figure 14 - Hearth Extension Requirements

The crack between the ﬁreplace

and the hearth extension must be

sealed with a non-combustible ma-

terial such as sand-cement grout.

Safety Metal Strip

Hearth Extension Non-Combusti-

ble Finish Material

Floor

Fireplace

1/2”

13mm

u Elevated ﬁreplace installations

require a special “Z” Metal

Safety Strips (ﬁeld provided),

in place of the safety metal strip

shown above. The safety strip

should extend the full width of

the ﬁreplace. When more than

one safety strip is used they must

overlap by a minimum of 1”.

Platform

2”

Fireplace

Elevated Fireplaces

39”

(990mm)

Min.

18”

Area where wood mantel

can be installed

Non-Combustible Material

45 Deg.

4”

32-3/4”

17” Min.

Hearth

extension

(457mm)

Min.

(832mm)

Min.

(432mm)

(102mm)

Mantel

12” Max.

(305mm)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Fireplace Framing

Header

* Total depth is 22-1/2 inches (572mm) including

the back spacer minus 1/2 inch (13mm) for drywall

to be ﬂush with the facing.

6’8’’

(2M)

Min.

2 x 3

Rough Framing Face

(dimension includes ﬁnish

material inside framing, if any)

Figure 16 - Framing Dimensions

Combustible materials can NOT

be used in the space directly

above the ﬁreplace. Do not ﬁll

the space above the ﬁreplace

with any material (Except the

wood framing)

Combustion Air Kit

OUTSIDE CHASE

Back Wall of Chase/Enclosure

Including Finishing Materials, if any

Rough Framing Face (Unfinished Shown)

* Zero

Clearance

From Back

Spacer to Wall

1/2” Plywood

WARNING: IF YOU ARE

INSTALLING THE CAST

FACADE PLEASE REFER TO

THE INSTALLATION SHEET

PROVIDED WITH THE CAST

FACADE TO PLAN YOUR

INSTALLATION.

NOTES

Diagrams, illustrations and photographs are not

to scale - consult installation instructions. Product

designs, materials, dimensions, speciﬁcations,

colors and prices are subject to change or discontinu-

ance without notice.

All framing dimensions calculated for 1/2" dry wall at

the ﬁreplace face. If sheathing the chase or ﬁnishing

with other thickness materials, calculations will

need to be made.

* The ﬁreplace must not be in contact with any insula-

tion or loose ﬁlling material. Cover the insulation

with drywall panels around the ﬁreplace.

K (allow space when framing)

10-3/4”

(273 mm)

22-3/8”

(568 mm)

31-3/8” (797 mm)

36” (915 mm)

21-5/8” (550 mm)

22-3/8” (569 mm)

25-1/8” (638 mm)

37-5/8”

(956mm)

32-1/2”

(826mm)

22-3/8”

(569 mm)

6-1/8”

(156 mm)

13-1/4”

(337mm)

20” (508 mm)

26-7/8” (683 mm)

35-1/8” (892 mm)

36” (915 mm)

Top View

Front View

Right Side View

Corner Installation

22-1/8”

19-5/8”

FRAMING DIMENSIONS

A 36” 915 mm

B 37-3/4” 959 mm

C 31-3/8” 797 mm

D 14-7/8” 378 mm

E 74-3/8” 1889 mm

F 37-1/4” 946 mm

G *22” 559 mm

J 52-5/8” 1337 mm

K 8” 203 mm

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Facing

1. Combustible material must be installed

ﬂush with the ﬁreplace. It may not project

in front of and on the ﬁreplace (i.e. the

steel facade of the ﬁreplace) (Figure 19).

2. Non-combustible materials such as brick,

stone or ceramic tile may project in front

of and onto the ﬁreplace facing up to the

tiling ﬂange (Figure 19).

1. Fireplace

2. Tiling ﬂange

3. Wood frame (2” x 3” min)

4. Drywall

5. Tiles or brick

Fireplace Frame Section

(Top View)

Figure 19

Nailing Flanges

Four nailing ﬂanges are provided to secure the

ﬁreplace to the ﬂoor (see Figure 18). Bend

the nailing ﬂanges down so that each ﬂange is

ﬂush with the ﬂoor, then using nails or screws,

secure the ﬁreplace to the ﬂoor (2 places each

side). The heads of the screws or nails must

be large enough to completely cover the holes

in the nailing ﬂanges.

Nailing Flange

(2 places each side)

Unbend to ﬂoor

and nail/screw

Mantel and Facing

The mantel must be installed at least 39’’ (990

mm) above the base of the ﬁreplace (Figures

15 and 20).

Fireplace Side

Figure 17

Figure 18

Insulated Chase Construction

7 Ft.

Min.

Attic

Radiation

Shield

Roof Support

Storm

Collar

Flashing

Drywall or

Any Rigid

Material

2” x 4”

1/2” Plywood

6’ 8”

Min.

Firestop

* Floor

Ceiling

Wall

* Floor

Ceiling

Wall

Fireplace

Insulate Joists

Same As Ceiling

Draft Stops

Firestop

CTDT

Termination

Note: Non-

Combustible

Chase

Flashing

Must Be

Used To

Cover

Chase

Opening

Optional

Insulation

In Outside

Walls Of

Chase

Solid

Continuous

Surface

Outside

Base

Insulation

(Thermal Barrier)

Level

NOTE: It is recommend-

ed that the chase walls

and ﬂoor be insulated in

the same manner, using

the same insulation, as

the rest of the building,

below the attic.

• Must have the same ﬁrestopping

resistance as adjacent wall.

• Must have the same insulation as

adjacent ceiling.

• Follow local rules regarding fram-

ing construction.

SEE NOTE

7 Ft.

Min.

Attic

Radiation

Shield

Roof Support

Storm

Collar

Flashing

Drywall or

Any Rigid

Material

2” x 4”

1/2” Plywood

6’ 8”

Min.

Firestop

* Floor

Ceiling

Wall

* Floor

Ceiling

Wall

Fireplace

Figure 21

Only non-combustible mate-

rial should be superposed or

projecting over the front of

the ﬁreplace.

38”

(965mm)

Min.

Figure 20

Mantel

Rock Board

or Other

Noncombustible

Facing

39’’ (990 mm)

Drywall

2 x 3 Min.

(51mm x 76mm)

Spacer

Mantel and Facing (Side View)

Rock Board

or Other

Noncombustible

Facing

Drywall

12”

(305mm)

Max.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

FIREPLACE BLOWER

The ﬁreplace is equipped with a blower. It is

located in the bottom of the ﬁreplace towards

the back. It uses 120V and must be connected to

the main electrical circuit by a qualiﬁed electri

cian prior to enclosing the ﬁreplace.

For connection, use the electrical box supplied

with the unit located on the bottom right side

of the ﬁreplace. To access the electrical box

remove the four screws, pull out the plate and

box and install the electrical receptacle.

Noncombustible Facing

Drywall

2 x 3 Min.

Rock Board or

Other

Spacer

Figure 22

A wall on/off switch must be installed to control

the blower. An optional heat switch and variable

speed control are available (see Page 28).

If installed, the heat activated switch must be

connected to the blower main cable and the

magnets must be stuck under the ﬁreplaces

ﬁrebox accessible through the side electrical

box access plate.

If a repair must be done after the ﬁreplace is

installed an access plate is located under the bot

tom refractory. Remove the bottom refractory,

unscrew the access plate, clean black cement

sealing the access plate and do the repair.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

The duct system must be installed respecting

the following:

1. Remove the plates closing up the 8” dia.

holes on top of the ﬁreplace. Then, cut

the insulation in order to obtain two 8” dia.

openings. Fix the adaptors on the ﬁreplace

openings by turning clockwise (Figures 23

and 24).

2. Maintain at least a 2” (50 mm) clearance

between the ducts and any combustible

material; the required hole size is 13” x 13”

(330 mm x 330 mm).

Exception #1: For the grills, the fram-

ing can be 10-3/4” x 10-3/4” (275 mm

x 275 mm) to provide the clearance as

required by the integral spacers on the

double outlet duct system.

3. The maximum number of elbows in a run of

duct is two.

4. Maintain at least 6-1/2” (160 mm) clearance

from the outlet grill framing to a combustible

ceiling, side wall, mantel or ﬂoor.

5. When traversing a combustible wall or ﬂoor,

a ﬁrestop must be installed at the wall or ﬂoor

penetration. The hole size must be 13” x 13”

(330 mm x 330 mm)

6. Do not connect the hot air ducts to a central

heating system. Malfunction of the heating

system’s blower will cause the ﬁreplace to

overheat. A furnace duct is only single wall

and not double wall as is required for the

WRT3920WS ﬁreplace hot air exhaust.

7. Use only IHP grills and components as

described in this manual. Other grills or

registers, for example, may be too restrictive

and may overheat the ﬁreplace or ceiling.

8. Do not use insulated ﬂexible ducts as they

will overheat.

9. Do not use tees or any other components

than the ones speciﬁcally listed here.

10. Never allow the ducting to pitch down as

hot air will be trapped creating a ﬁre hazard.

Never route the ducting downwards.

11. The hot air outlet grills must be installed with

the louvers pointing downwards in order to

prevent overheating adjacent ceilings.

Figure 25

Rain Cap

Flashing Collar

Flashing

Firestop

39” Min.

(990mm)

Non-Combustible

Facing

Roof Support

Attic Radiation Shield

Combustibles are not allowed below top spacers

above the ﬁreplace. Facing in front of ﬁreplace must

be non-combustible below this area.

NOTES:

- Seal the top and

both sides of the

roof flashing with

waterproof caulk-

ing.

- The gap between

the vent pipe and

a vertical firestop

shall be sealed with

non-combustible

caulking.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Central Forced Air Kit

NOTE: Not tested under EPA certiﬁcation. If

installed, this appliance no longer qualiﬁes

for EPA certiﬁcation.

The knock-outs provided on the back and on

the sides of the WRT3920WS ﬁreplace allow

the connection of insulated ﬂexible pipe which

enables you to heat adjacent rooms up to 50

feet from the ﬁreplace hot air outlet.

The ducting system must be installed as de-

scribed below:

A) Remove knock-out plate and cut insulation

the adaptor at the back and/or the side of the

ﬁreplace. Fix the adaptor by twist-locking

it to the ﬁreplace. You can use more than

one outlet on the ﬁreplace (see Figure 26).

B) Attach the 5” ﬂexible pipe, using the collars

provided. Important: Make sure that the

plastic wrapping around the ﬂexible pipe

will not be in contact with the ﬁreplace.

C) Route the ﬂexible pipe to the chosen location.

The ducting system can be installed either

in an upper room or in a lower room.

D) Attach the ﬂexible pipe to the blower, using

the collars (Figure 27).

E) Fix the back draft damper to the blower

outlet.

F) Attach a ﬂexible pipe to the fan / ﬂexible pipe

adapter (square to round) and stretch it up

to the location where the heat is required.

G) At that point, the ﬂexible pipe can be attached

to any air distribution grill.

H) Install the blower heating and cooling ther-

mostat (HCTW) in that part of the house to

be heated by the hot air duct. The thermostat

can be switched to a cooling thermostat and

installed in the same room as the unit. This

thermostat will turn on the blower when the

room where the ﬁreplace is located becomes

too hot.

This option requires electricity. Make sure that

the connections to the blower have been made

according to the local codes and comply with

their requirements (see instruction provided

with the thermostat). For more information

regarding central forced and ducting, refer

to the BISFWK-1 installation sheet provided

with the kit.

Figure 28 - Outside Connection

Figure 29 - Outside Air Connection To The Fireplace

Aluminum Tape

Fireplace

Connection

Plastic

Cover

Insulation

Flexible Pipe

Fireplace

Outside

Intake

Screw

Opening

Facing

Down

Wall

Aluminum Tape

Plastic Cover

Insulation

Flexible Pipe

Aluminum Tape

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Figure 27

Aluminum Tape

Insulation

Blower

Tightening Collar

Flex 5” Diameter

OUTSIDE AIR KIT

It is mandatory to install an outside air connection to the WRT3920WS

ﬁreplace. The following components are required and are included with

the ﬁreplace:

• Outside air kit (includes 4 inch ﬂex that goes up to ten (10) feet long)

• 4” Adaptor for ﬁreplace connection

Outside Air Installation

The outside air assembly may be installed according to the following

requirements:

A) Duct length should be kept to a minimum. The maximum length of a

4” interior diameter (100 mm) insulated ﬂexible duct is 20 feet (6.1 m).

The duct can be extended to a maximum of 40 feet (12 m) using a 6”

interior diameter (150 mm) insulated ﬂexible duct (See note below).

B) The air intake register must not be installed more than ten (10) feet

(3050 mm) above the base of the ﬁreplace.

C) The fresh air must come from outside the house. The air intake must

not draw air from the attic, basement or garage.

D) The air intake should be installed where it is not likely to be blocked by

snow or exposed to extreme wind and away from automobile exhaust

fumes, gas meters and other vents.

E) The duct and register may be installed above or below ﬂoor level.

NOTE: We recommend not to exceed 20 feet of 4” ﬂexible pipe. If you

require a longer length we recommend that you use a 5” diameter ﬂex-

ible pipe for the complete run up to 30 feet and a 6” diameter pipe for a

run of up to 40 feet.

Make a 4-1/4” (110 mm) hole in the outside wall of the house at the chosen

location. From outside, place the outside air register in the hole (open

side down) and fasten the register to the wall with screws as shown (see

Figure 28). Slip the pipe into the insulated sleeve. Place the insulated

pipe over the register tube and over the ﬁreplace’s outside air connector

(see Figure 29). At each end, carefully pull back the insulation and plastic

cover exposing the ﬂexible pipe. Using the aluminium tape provided,

wrap the tape around the joint between the ﬂexible pipe and the air inlets.

Carefully push the insulation and plastic cover back over the pipe. Using

aluminium tape, fasten the plastic cover in place.

Figure 26

Adaptor

Insulated

Flex Pipe

DRAFT REQUIREMENTS

Draft is the force which moves air from the appliance up through the

chimney. The amount of draft in your chimney depends on the length of

the chimney, local geography, nearby obstructions and other factors. Too

much draft may cause excessive temperatures in the appliance and may

damage the catalytic combustor. Inadequate draft may cause backpufﬁng

into the room and `plugging’ of the chimney or the catalyst.

Inadequate draft will cause the appliance to leak smoke into the room

through appliance and chimney connector joints.

An uncontrollable burn or excessive temperature indicates excessive draft.

THE CHIMNEY SYSTEM

Chimney Installation Notes

1. This appliance is equipped with a universal vent collar that will require

the ﬁrst vent section of pipe to be secured with four screws to the

collar (equally spaced around circumference).

2. If possible, install an interior chimney as it will provide better perfor

mance. In areas with continuous temperatures below -18° C (0° F),

the use of an exterior chimney increases the likelihood of operating

problems such as low draft, high rate of creosoting, and poor start-up

characteristics. Exterior chimneys are also prone to down-draft and

ﬂow reversal. Installations, which are located on lower ﬂoors in the

house, such as in a basement, in combination with outside chimney,

are especially prone to ﬂow reversal.

3. The IHP ﬁreplace model WRT3920WS may be installed only with Se

curity Chimneys

6” diameter chimney systems

or DuraVent models

DuraTech and DuraTech

DTC chimney systems

The WRT3920WS

ﬁreplace may also be installed with a 7’’ chimney system (ASHT

or HT6103

) using the optional 6AW7

7’’ adaptor (7’’ AC chimney

is not allowed). For more information refer to chimney installation

manual.

4. A chimney venting a ﬁreplace shall not vent any other appliance.

5. The minimum chimney height is twelve (12) feet (3.7 m). In altitude,

add 18” (450 mm) to the chimney for every 2,000 feet (600 m) above

sea level.

6. All chimney

installations must include at least one support. Re-

ducing the amount of chimney weight on the ﬁreplace will help avoid

the noise created when the ﬁreplace expands. This can be achieved

by having the chimney supported by the supports. The maximum

chimney length that can be supported by the ﬁreplace is nine (9) feet

(2.75 m) for S-2100+/HT6000+, twelve (12) feet (3.7 m) for ASHT+

/ HT6103+

/ DuraTech DTC

and 26 feet (8 m) for AC chimney.

7. The chimney must extend at least three (3) feet (915 mm) above its point

of contact with the roof and at least two (2) feet (610 mm) higher than

any wall, roof or building within ten (10) feet (3m) of it (Figure 30).

NOTE: 2" clearance to combustibles around chimney components required.

NOTE: Blown or ﬁll type insulation materials must not be in contact with

the ﬁreplace or in the enclosure frame as described in ‘’Enclosure’’ section.

NOTE: Local codes may not require ﬁrestopping at the ceiling levels for

outside chase installations. However, it is recommended for safety and

the reduction of heat loss.

Figure 30

ten (10) feet

three (3) feet Min.

two (2) feet Min.

Available from Security Chimneys

Available from DuraVent

8. If the chimney extends higher than ﬁve (5) feet (1,500 mm) above its

point of contact with the roof, it must be secured using a roof brace.

9. A rain cap must be installed on top of the chimney. Failure to install

a rain cap may cause corrosion problems.

10. Cut and frame square holes in all ﬂoors, ceilings, and roof that the

chimney will go through to provide a 2” (50 mm) clearance between

the chimney and any combustible materials. Do not ﬁll this 2” space

with insulation or any other combustible material.

11. Portions of the chimney which may extend through accessible spaces

must be enclosed to avoid contact with combustible materials or

damage to the chimney.

12. When offsets are used, the pipe may not penetrate a ceiling or ﬂoor

unless it is running vertical (no 30° offsets).

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

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Superior Fireplaces WRT3920 Operating instructions

Brand: Superior Fireplaces

Model: WRT3920

Category: Stoves

Type: Operating instructions

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Superior Fireplaces WRT3920 Operating instructions

Superior Fireplaces WRT3920 Operating instructions

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